.group {
  background-color: #fff;
  padding: 100px 80px;
  .logo {
    display: block;
    width: 400px;
    height: 100px;
    margin: 0 auto;
    margin-bottom: 60px;
    background-color: #ddd;
  }
  .tips {
    font-size: 28px;
    color: #333;
    text-align: center;
  }
  .btn {
    margin-top: 60px;
  }
}